Question

which vitamin can be produced in human skin by the sunlight ? A) ergocalciferol B)cholecalciferol C)25, hydroxycholecalciferol
D)1, 25 dihydroxycholecalciferol
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Answer 1

Answer:

Vitamin D is metabolized sequentially in the liver and kidneys into 25-hydroxyvitamin D which is a major circulating form and 1,25-dihydroxyvitamin D which is the biologically active form respectively.